<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
.box{
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin:100px auto;
    background-color: brown;
    animation: move 5s linear infinite;
}
@keyframes move {
    0%{
        transform: translateY(0);
    }
    25%{
        transform: translateX(500px)
    }
    50%{
        transform: translate(500px,500px)
    }
    75%{
        transform: translate(0,500px)
    }
    100%{
        transform: translateY(0)
    }
}
    </style>
</head>
<body>
  <div class="box"></div>  
</body>
</html>